Abstract
Gold layers on the surface of a cylindrical tungsten single crystal were investigated by LEED and work function change measurements. Work function changes during gold adsorption on (110), (111), (112), (115) and (001) faces, and structures deduced from LEED patterns for (110), (112), (332) and (001) faces are presented with a common coverage scale. Upon heating the gold-covered crystal up to 1000 K, faceting occurs with faceted regions as large as 20°, 13° and 4° around the [112], [110] and [332] directions, respectively. The diffusion of the gold layer was studied by the movement of the sharp boundary across the cylindrical crystal surface at a temperature of 1000 K. The diffusion rate was found to be much higher in the (112) region than in the (001) region.
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